多孔钛基氢氧化锰电极的制备及电容特性  

Fabrication and capacitive characteristics of a porous Ti/ Mn(OH)_2 electrode

作　　者：徐国荣[1] 彭满芝[1] 唐安平[1] 吴海江[1] 

机构地区：[1]湖南科技大学化学化工学院.理论化学与分子模拟省部共建教育部重点实验室分子构效关系湖南省普通高等学校重点实验室,湖南湘潭411201

出　　处：《电源技术》2013年第9期1559-1561,1565,共4页Chinese Journal of Power Sources

基　　金：湖南省科技厅计划项目(2012GK3098)

摘　　要：用电化学方法制备了一种多孔钛基氢氧化锰膜电极。钛片在热的盐酸中刻蚀20 min,然后在刻蚀的钛基体上阴极电沉积一层氢氧化锰。用扫描电镜仪、X射线粉末衍射仪分别考察了氢氧化锰膜电极的形貌、晶体结构特征,用循环伏安法和充放电曲线法测试氢氧化锰膜电极的电化学性能。结果表明,腐蚀后的钛基体呈现多孔特征,孔径大小在微米级范围。沉积的氢氧化锰呈现纳米片状结构,并相互交错成花状形貌。充放电曲线法测得氢氧化锰膜电极的质量比电容达340 F/g,比普通钛基氢氧化锰膜电极高出28%。循环稳定性测试表明200次循环后,多孔钛基氢氧化锰膜电极比电容只下降7%,而在后续循环扫描过程中容量保持非常稳定。多孔钛基氢氧化锰膜电极是一种有潜力的电化学电容器电极。A kind of porous Ti-supported manganese hydroxide electrode was fabricated by electrochemical method. The Ti electrode was etched by hot concentrated hydrochloric acid, and then manganese hydroxide film was electro deposited on Ti substrate under a potentiostatic mode. The surface morphologies and crystal structure of the manganese hydroxide electrode were characterized by SEM and XRD, respectively. The capacitive of manganese hydroxide film electrode was investigated by cycle voltammetry and constant-current charge-discharge method. The results show that Ti exhibits a highly porous surface morphology with an irregular pore size in a range of micrometers after being etched. The deposited manganese hydroxide film exists as flowerlike morphology consisting of nanosheets. The manganese hydroxide film electrode presents a maximum specific capacitance of 340 F/g by cycle voltammetry test at a scan rate of 5 mV/s. After 200 cycle tests, the specific capacitance of the porous Ti-supported manganese hydroxide electrode decrease 7% of the original value, and during the subsequent cycle voltammetry test, the porous Ti-supported manganese hydroxide exhibits a high cyclic stability

关 键 词：电化学电容器 氢氧化锰 电沉积 多孔钛 

分 类 号：TM53[电气工程—电器]